CesrTA Down Time and Run Plan

Mark PalmerCornell Laboratory for

Accelerator-Based Sciences and Education

March 5, 2008 TILC08 - Sendai, Japan 2

Overview

March 5, 2008 TILC08 - Sendai, Japan 3

Down 1 and Run 1

• Install instrumented CESR dipole and drift region chambers – segmented RFAs. • Remove first wigglers from CESR Arcs

• Characterize newly installed diagnostics and cloud growth in CESR dipole chamber. • Work with an intermediate emittance (7 nm) lattice and start beam-based alignment program.• Instrumentation tests/development

March 5, 2008 TILC08 - Sendai, Japan 4

Down 2

• Reconfigure CESR for ultra-low emittance• Install positron xBSM optics line• Start deployment of new BPM system• Upgrade survey network and alignment hardware• Install instrumented vacuum section in L0 (CLEO IP)• Install instrumented vacuum system in L3 (CUSB IP)• Remove all wigglers from arcs and re-deploy in L0• Deploy first instrumented wigglers in L0 (2?)• Deploy vacuum diagnostics with with wiggler

replacement chambers in CESR arcs• Deploy L3 diagnostic chicane?• Complete upgrade of transverse feedback system for 4

ns bunch spacings

March 5, 2008 TILC08 - Sendai, Japan 5

“Run 2”

• “Run 2” was recently split into 2 pieces, 2a and 2b– Accommodates CHESS request

– Removes stress of a single long dedicated CesrTA run

– Adds time to think between CesrTA periods

• xBSM optics commissioning

• BPM system commissioning

• Beam-based alignment effort

• Test ultra low emittance lattice for first time

• Characterize electron cloud growth in chambers around the CESR ring (wigglers, dipoles and drifts)

March 5, 2008 TILC08 - Sendai, Japan 6

Down 3

• Install instrumented vacuum chambers and chambers with EC mitigation techniques– Additional wiggler chambers

– Additional dipole chambers

– First quadrupole chamber diagnostics

• Continue deployment of new BPM system

• Continue upgrade of survey network and alignment hardware

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Run 3

• Some adjustment to the exact schedule for Run 3 is likely

• BPM system commissioning

• Beam-based alignment effort

• Low emittance tuning work

• Characterize electron cloud growth in chambers around the CESR ring (wigglers, dipoles, quadrupoles and drifts).

• Evaluate efficacy of EC mitigation techniques

March 5, 2008 TILC08 - Sendai, Japan 8

Down 4

• Install instrumented vacuum chambers and chambers with EC mitigation techniques– Additional wiggler chambers– Additional dipole chambers– Additional quadrupole chambers

• Planned installation of electron xBSM optics line• Planned installation of photon stop for 5 GeV wiggler

tests in L0• Complete longitudinal feedback upgrade for 4 ns bunch

spacings

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Runs 4-6

• Major focus on low emittance tuning effort

• Beam dynamics studies spanning a range of emittances

• Tests with wigglers at 5 GeV

• Commissioning of electron xBSM optics line

• Characterize electron cloud growth in chambers around the CESR ring (wigglers, dipoles, quadrupoles and drifts).

• Evaluate efficacy of EC mitigation techniques

March 5, 2008 TILC08 - Sendai, Japan 10

Down 5

• Deploy final vacuum chambers with EC mitigation for testing